NEETBiologyMolecular Basis of InheritanceMCQ+4 / −1
E. coli cells with a mustard z gene of the lac
operon cannot grow in medium containing only
lactose as the source of energy because -
- AThey cannot transport lactose from the medium into the cell
- BThey cannot synthesize functional beta galactosidase
- CIn the presence of glucose, E. coli cells do not utilize lactose
- DThe lac operon is constitutively active in these cells
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